Using the Service Observing feature, a supervisor or authorized user can use a telephone to activate an observing session towards a station, an agent Login ID, or VDN to listen in and talk on calls received by the station, agent, or VDN for quality control and training purposes. The audio from the observed connection is switched in to the first idle appearance on the phone being used for the Service Observing feature. The observer remains off-hook or idle during the call.